guckenheimer.dk

📜 Historical scan 2026-08-16 15:58:08 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

guckenheimer.dk is a .dk domain served by 2 nameservers (emily.ns.cloudflare.com, langston.ns.cloudflare.com). It was registered on 12 July 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.4.152 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx10.mailspamprotection.com, mx20.mailspamprotection.com and 1 more. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 18ms

Nameserver	IP addresses	PTR	ASN / ISP
emily.ns.cloudflare.com	108.162.192.155 172.64.32.155 173.245.58.155 2606:4700:50::adf5:3a9b 2803:f800:50::6ca2:c09b 2a06:98c1:50::ac40:209b	emily.ns.cloudflare.com emily.ns.cloudflare.com emily.ns.cloudflare.com emily.ns.cloudflare.com emily.ns.cloudflare.com emily.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
langston.ns.cloudflare.com	108.162.195.252 162.159.44.252 172.64.35.252 2606:4700:58::a29f:2cfc 2803:f800:50::6ca2:c3fc 2a06:98c1:50::ac40:23fc	langston.ns.cloudflare.com langston.ns.cloudflare.com langston.ns.cloudflare.com langston.ns.cloudflare.com langston.ns.cloudflare.com langston.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 44ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.4.152	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.154.52	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

3 records 9ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx10.mailspamprotection.com	34.149.79.66	66.79.149.34.bc.googleusercontent.com	AS396982 Google LLC
20	300s	mx20.mailspamprotection.com	34.120.156.61	61.156.120.34.bc.googleusercontent.com	AS396982 Google LLC
30	300s	mx30.mailspamprotection.com	34.111.121.216	216.121.111.34.bc.googleusercontent.com	AS396982 Google LLC

🔷 AAAA Records (IPv6)#

2 records 7ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3037::6815:498	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000::/42	—	—
2606:4700:3034::ac43:9a34	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000::/42	—	—

🔐 HTTPS Records#

1 records 40ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.4.152,172.67.154.52 ech=AEX+DQBBQgAgACBPvuO2KyEtVIp4HlOTt5RBzYhVDIo6Zuqpk5JbNn4fNAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:9a34,2606:4700:3037::6815:498

📝 TXT Records#

1 records 97ms

TXT Record
v=spf1 +a +mx +ip4:35.214.209.56 include:_spf.mailspamprotection.com ~all

✉️ SPF#

Policy	Record (guckenheimer.dk)
~all (soft fail)	v=spf1 +a +mx +ip4:35.214.209.56 include:_spf.mailspamprotection.com ~all

📨 DMARC#

Policy	Record (_dmarc.guckenheimer.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:615c1b540a3c443d8bdab50ee6d4b410@dmarc-reports.cloudflare.net

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 09:40:13

www	104.21.4.152 172.67.154.52 2606:4700:3034::ac43:9a34 2606:4700:3037::6815:498 (AS13335) (address records, no CNAME)
www vs bare domain	Same network guckenheimer.dk: 104.21.4.152 172.67.154.52 2606:4700:3034::ac43:9a34 2606:4700:3037::6815:498 (AS13335) www.guckenheimer.dk: 104.21.4.152 172.67.154.52 2606:4700:3034::ac43:9a34 2606:4700:3037::6815:498 (AS13335)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

200ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

7ms

Field	Value
Serial	2408359146
Primary NS (MNAME)	emily.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-23 19:09:08

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2022-07-12
Expires	2028-07-11 (626d)

🔗 Same registrant#

4 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
actone.dk	Simply.com A/S
flxit.dk	Punktum dk A/S (direct)
go-rewired.dk	Simply.com A/S
souschef.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

18ms

44ms

9ms

AAAA

7ms

TXT

97ms

CAA

43ms

HTTPS

40ms

TLSA

5229ms

SOA

7ms

MTA-STS

47ms

DNSSEC

200ms

SRV

0ms

Total

7247ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-24 02:55:01	898ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-23 23:44:47	684ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-18 17:39:09	1995ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-16 09:42:17	2342ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-09 07:57:49	2545ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-29 23:10:09	2564ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-26 22:11:28	1493ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-20 23:58:06	25296ms	2 NS 2 A 3 MX	🔓 Insecure
2026-08-16 15:58:08 shown	7247ms	2 NS 2 A 3 MX	🔓 Insecure
2026-07-03 13:07:31	3489ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-25 10:05:27	848ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-21 09:06:59	2969ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-19 09:29:29	1056ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-17 10:00:40	9162ms	2 NS 2 A 3 MX	🔓 Insecure